Name ________________________________________________________ Period ____

1.2.5a Electron Affinity Quiz 1 (ck12)

1.  The removal of an electron from a neutral atom _____ energy, while the addition of an electron to a neutral atom usually _____ energy.

1. absorbs; absorbs
2. absorbs; releases
3. releases; absorbs
4. releases; releases

2.  Define electron affinity.

3.  When electron affinities are measured, what state of matter is the element in?

1. solid
2. liquid
3. gas
4. No specific state is necessary.

4.  Which equation shows the electron affinity of bromine?

1. Br + e- → Br - + energy
2. Br + e- + energy → Br -
3. Br - + energy → Br + e-
4. Br - → Br + e- + energy

5.  Energy that is released in a chemical reaction or physical change is expressed as a positive number.

1. True
2. False

6.  Which group has the highest electron affinities?

1. noble gases
2. alkali metals
3. group 13
4. halogens

7.  How many electrons must be added to a fluorine atom to achieve the electron configuration of a noble gas?

1. 1
2. 3
3. 5
4. 7

8.  In general, electron affinity _____ from left to right across a period of the periodic table.

1. increases
2. decreases
3. stays the same
4. increases and decreases randomly

9.  In general, electron affinity _____ from top to bottom down a group of the periodic table.

1. increases
2. decreases
3. stays the same
4. increases and decreases randomly

10.  There are frequent exceptions to the period and group trends for electron affinity.

1. True
2. False